It came as quite a surprise to me when I asked a simple question about turning speed bongs on a RS3 FL off, or to a 'remember last setting'
The information below is not from me, it is purely a 'copy paste' from someone on the SeatCupra forum who appears to know what he is talking about, it's a little worrying that the likes of SFD2 is going to tie you to a dealer for just about anything going forward...
After discussions with retrofitters and VW engineers, here is what I know about SFD2:
- SFD2 was implemented as a result of passing stricter EU legislations for vehicles. The legislations in question are: UNECE R155 (Cyber Security and Cyber Security Management System [CSMS]) & UNECE R156 (Software Update and Software Update Management Systems [SUMS])
- SFD2 does not work like SFD. A SFD2 token is a two part authentication token - release is granted if a part of the token stored on your cars unit matches with the half stored on VW servers. It is possible that a 3rd party will never be able to unlock an SFD2 protected unit as they would require unprecedented access to VW databases... I don't know if VW will go for that. But, VW likes money, so given time we might get SFD2 capable 3rd party diagnostics, but for sure it won't be cheap...
- Even for online ODIS, some changes cannot be done - my colleague with dealership access rights to ODIS had issue disabling ISA (Intelligent speed assist) on a Golf 8 FL. I assume it will be the same for disabling other "safety features" due to stricter regulatory pressures on VW from the legislative body of the EU to have them active.
- Even with ODIS you need to pay a "session fee" to log into a SFD2 protected unit. It is a true money drain. One coding session (per unit) is cca 130 euro + VAT. Now imagine coding a feature spread across several units...
- Adding or swapping SFD2 protected units might not be possible - for an unit not originally fitted to the car, the SFD2 tokens on the unit and VW server won't match, possibly blocking parametrization of the unit.
So guys, if you like to work on your car it's is best to stick to the pre-SFD2 models. Might take a while before we can do anything to the new cars.
The information below is not from me, it is purely a 'copy paste' from someone on the SeatCupra forum who appears to know what he is talking about, it's a little worrying that the likes of SFD2 is going to tie you to a dealer for just about anything going forward...
After discussions with retrofitters and VW engineers, here is what I know about SFD2:
- SFD2 was implemented as a result of passing stricter EU legislations for vehicles. The legislations in question are: UNECE R155 (Cyber Security and Cyber Security Management System [CSMS]) & UNECE R156 (Software Update and Software Update Management Systems [SUMS])
- SFD2 does not work like SFD. A SFD2 token is a two part authentication token - release is granted if a part of the token stored on your cars unit matches with the half stored on VW servers. It is possible that a 3rd party will never be able to unlock an SFD2 protected unit as they would require unprecedented access to VW databases... I don't know if VW will go for that. But, VW likes money, so given time we might get SFD2 capable 3rd party diagnostics, but for sure it won't be cheap...
- Even for online ODIS, some changes cannot be done - my colleague with dealership access rights to ODIS had issue disabling ISA (Intelligent speed assist) on a Golf 8 FL. I assume it will be the same for disabling other "safety features" due to stricter regulatory pressures on VW from the legislative body of the EU to have them active.
- Even with ODIS you need to pay a "session fee" to log into a SFD2 protected unit. It is a true money drain. One coding session (per unit) is cca 130 euro + VAT. Now imagine coding a feature spread across several units...
- Adding or swapping SFD2 protected units might not be possible - for an unit not originally fitted to the car, the SFD2 tokens on the unit and VW server won't match, possibly blocking parametrization of the unit.
So guys, if you like to work on your car it's is best to stick to the pre-SFD2 models. Might take a while before we can do anything to the new cars.


